![]() (TI) is an American technology company that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally. There are many applications for it, but the three circuits described below have all been tested by practice for reference by those who love carrier communication. The following describes the classic circuit diagram of the phase-locked loop LM567 used in carrier communication applications. LM567 is generally used in the following situations: Usually, a 1♟ capacitor is connected to this pin. The bandwidth in which the device will detect the desired frequency depends on the capacity of the loop filter terminal. An external RC filter is required to adjust this frequency. The internal free operating frequency of the VCO defines the center frequency of the detection band. When the input signal is in the detection band, the device output changes to the LOW state. The device has an open collector transistor output, so an external resistor is required to reach the appropriate logic levels. ![]() ![]() The LM567 tone decoder is a device capable of detecting whether an input signal is within a selectable detection range. Center Frequency Adjustable from 0.01 Hz to 500 kHz.High Rejection of Out of Band Signals and Noise.Logic Compatible Output With 100-mA Current Sinking Capability.20 to 1 Frequency Range With an External Resistor.The configuration of all 8 pins and the function of each pin is as follows:Īnd the function of all 8 pins and the function of each pin are as follows: The datasheet provided above is for your reference so that you can understand the physical dimensions of all packages in more detail. Due to its good noise suppression ability and center frequency stability, it is widely used in the decoding of various communication equipment and the demodulation circuit of AM and FM signals. LM567 is a high-stability low-frequency integrated phase-locked loop decoder.
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